Draw flowgraphs and calculate the cyclomatic complexity, v(G), essential complexity, ev(G), module design complexity, iv(G), system design complexity, S₀, and integration complexity, S₁ for the software code below.

LABELS	PROGRAM LISTING
	PROGRAM matsub
	c	Product of two matrices
		dimension a(10,10),b(10,10),c(10,10)
		integer p,q
		write(*,*)'To find the product of two matrices.'
		write(*,*)'Enter the order of the first matrix:'
		read(*,*)m,n
		write(*,*)'Enter the order of the second matrix:'
		read(*,*)p,q
		IF(n.NE.p)THEN
		write(*,*)'The matrices are not conformable for multiplication.'
		STOP
		ENDIF
		call inpt(a,m,n)
		call inpt(b,p,q)
		call pro(a,b,c,m,n,q)
		call outpt(c,m,q)
		STOP
		END
		subroutine inpt(a,m,n)
		dimension a(10,10)
		write(*,10)m,n
	10	format(1x,'Enter the matrix of order',I2,' *'I2,' :')
		read(*,*)((a(i,j),j=1,n),i=1,m)
		END
		subroutine pro(a,b,c,m,n,q)
		dimension a(10,10),b(10,10),c(10,10)
		integer q
		DO 20 i=1,m
		DO 30 j=1,q
		c(i,j)=0
		DO 40 k=1,n
		c(i,j)=c(i,j)+a(i,k)*b(k,j)
		read(*,*)((a(i,j),j=1,n),i=1,m)
	40	continue
	30	continue
	20	continue
		END
		subroutine outpt(c,m,q)
		dimension c(10,10)
		integer q
		write(*,*)'The product matrix is: '
		DO 50 i=1,m
		DO 60 j=1,q
		write(*,70)c(i,j)
	70	format(3x,F6.2,4x\)
	60	continue
		write(*,*)
	50	continue
		END